JP3726437B2 - Drilling tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drilling tool for drilling a work material such as concrete by rotating and striking and collecting dust after drilling. The present invention relates to a technique for enabling simultaneous use of a dust cup, an auxiliary handle, and a depth gauge, improving ease of use, and improving dust resistance to a chuck portion of a drill bit.
[0002]
[Prior art]
Conventionally, when a drilling operation is performed using a drilling tool, the dust falls on the worker side especially during the upward operation, which is not only poor in workability but also has a safety problem. In order to solve this problem, there is a dust collecting means configured to surround the drill bit with an elastic bellows-shaped dust collecting cup so that dust does not escape.
[0003]
[Problems to be solved by the invention]
However, the conventional dust collecting cup is attached and detached near the rotation drive part (for example, chuck) of the tool body, and dust enters the attaching part of the dust collecting cup, and the dust collecting cup itself also rotates due to the influence. The dust collecting cup can be attached to and detached from the main body housing, but the auxiliary handle cannot be used at the same time. In addition, the depth gauge cannot be used at the same time in any case where the dust collection cup and the auxiliary handle are used, and when using the dust collection cup, the drill bit is difficult to see and the dust collection cup is used. Sometimes it was difficult to drill holes of a certain depth.
[0004]
In addition, the dust-proof rubber 6a is provided to prevent dust from entering the chuck portion such as a drill bit inside the dust-collecting cup, but the circular dust-proof rubber 6a is radially arranged as shown in FIG. A kerf 8a is formed so that the drill bit can be inserted. Therefore, the dust-proof property is poor and the dust easily enters the chuck part. As a result of the intrusion, the bit is seized or cannot be removed. there were.
[0005]
The present invention has been made in view of such problems, and the object of the present invention is to make effective use of the auxiliary handle, and attach the dust collection cup to the detachable cup so that the dust collection cup is unforeseen. It is intended to provide a drilling tool which does not rotate, can use both an auxiliary handle and a depth gauge at the same time, enhances ease of use, and can satisfactorily prevent dust on the chuck portion.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, a drilling tool including a drill bit 1 protruding from the tip and driven to rotate, an auxiliary handle 2 provided at the tip, and a telescopic dust collecting cup 3 surrounding the drill bit 1. The mounting base 4 is detachably attached to the auxiliary handle 2, the dust collecting cup 3 is detachably attached to the mounting base 4, and the peripheral portion of the dustproof plate 6 penetrating the hole 7 through which the drill bit 1 is inserted is attached. A dustproof plate is attached to the mounting base 4 by engaging with the tip of the base 4 .
[0007]
In the invention of claim 2 , the auxiliary handle 2 holds the depth gauge 5 substantially parallel to the drill bit 1, and sets the radius of the dust collecting cup 3 to the distance from the rotation center P of the drill bit 1 to the depth gauge 5. It is characterized by being smaller than L.
[0008]
In the invention of claim 3, characterized in that obtained by forming radially substantially V-shaped grooves 8 dustproof plate 6 from the center of the dust-proof plate 6.
[0009]
In the configuration of the first aspect, both the auxiliary handle 2 and the dust collection cup 3 can be used simultaneously, and the dust collection cup 3 does not rotate unexpectedly. Further, the mounting base 4 can be shaped to be easily attached to the auxiliary handle 2, and the mounting base 4 can be made easy to attach the dust collecting cup 3, so that the dust collecting cup 3 can be easily attached to the auxiliary handle 2. You can do it.
In the structure of Claim 2 , in addition to the effect | action of Claim 1, the dust collection cup 3 and the depth gauge 5 can be used simultaneously, and when the drill bit 1 becomes difficult to see by using the dust collection cup 3, However, drilling with a depth determined by the depth gauge 5 can be performed.
[0010]
In the structure of Claim 3 , in addition to the effect | action of Claim 1, compared with the conventional slit, the dustproof property with respect to chuck parts, such as the drill bit 1, can be improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 (a) shows an overall perspective view, and FIG. 1 (b) shows a partially broken side view.
As shown in FIGS. 1 (a) and 1 (b), the drilling tool A is a drill which holds the handle 9 and turns on the switch 10 and is held in the chuck portion 11 by the battery built in the housing 12 via the conduction drive portion. The bit 1 is rotated and driven to perforate a work material such as concrete. The auxiliary handle 2 is detachably attached to the distal end portion of the housing 12.
[0012]
5 and 6 show a configuration in which the auxiliary handle 2 is attached to the housing 12. For example, a metal belt 13 is wound around the outer periphery of the housing 12, a bolt 14 is inserted, and an upper body 15 is inserted into the bolt 14. The auxiliary handle 2 is inserted into the bolt 14, and a nut 16 embedded in the auxiliary handle 2 is screwed into the bolt 14 , so that the auxiliary handle 2 is detachably attached to the housing 12. The auxiliary handle 2 can change its orientation with respect to the housing 12, and can handle right-handed and left-handed people.
[0013]
3 and 4 show a mounting base 4 which can be attached to the auxiliary handle 2 with a single touch. The mounting base 4 is attached with a bellows-shaped dust collecting cup 3 to surround the drill bit 1 and in drilling processing. The dust is prevented from being scattered outside. The configuration will be described in detail below.
A cylindrical engagement portion 17 is formed on the mount 4 so that it can be engaged with the outer peripheral portion of the front end portion of the housing 12. A contact plate 18 is suspended from the engaging portion 17 of the mounting base 4, a pair of holding pieces 19, 19 are extended from the contact plate 18, and a hook 20 is formed at the tip of the holding piece 19. 1A, the engaging portion 17 of the mounting base 4 is engaged with the front end portion of the housing 12, the contact plate 18 is brought into contact with the front surface of the cylindrical auxiliary handle 2, and a pair of The holding pieces 19, 19 are elastically held using the elastic deformability of the holding pieces 19, 19 on the left and right sides of the cylindrical auxiliary handle 2, and the hook 20 is attached to the back of the cylindrical auxiliary handle 2. By turning, the mounting base 4 can be attached to the auxiliary handle 2 with one touch.
[0014]
A plurality of locking projections 21 are formed on the outer peripheral portion of the engaging portion 17 of the mounting base 4 at intervals in the circumferential direction, and the base portion of the bellows-shaped dust collecting cup 3 made of a transparent or translucent synthetic resin. Are locked to the locking protrusions 21 to prevent the dust collecting cup 3 from being removed.
As described above, the mounting base 4 is detachably attached to the auxiliary handle 2, and the dust collecting cup 3 is detachably attached to the mounting base 4, so that the mounting base 4 can be easily attached to the auxiliary handle 2. The mounting base 4 can be shaped so that the dust collecting cup 3 can be easily attached, and the dust collecting cup 3 can be easily attached to the auxiliary handle 2.
[0015]
A depth gauge attachment hole 22 is formed in the upper body 15 constituting the auxiliary handle 2, and the depth gauge 5 can be fastened and fixed at a predetermined position by rotating a pinching fastener 23. In this case, the radius of the dust collecting cup 3 is made smaller than the distance L from the rotation center P of the drill bit 1 to the depth gauge 5, and the dust collecting cup 3 and the depth gauge 5 can be used at the same time. By using the cup 3, drilling with a depth determined by the depth gauge 5 can be performed even when the drill bit 1 is difficult to see.
[0016]
FIG. 7 shows the dustproof plate 6. The rubber dustproof plate 6 has a hole 7 through which the drill bit 1 is inserted, and the inner peripheral groove 25 of the peripheral cylindrical portion 24 is formed at the tip of the mounting base 4. By engaging with the outer peripheral projection 26, the dustproof plate 6 can be attached to the mounting base 4.
The dustproof plate 6 is formed with a substantially V-shaped groove 8 radially from the center of the dustproof plate 6, so that the dustproof property against the chuck portion such as the drill bit 1 can be improved as compared with the conventional slit. is there.
[0017]
【The invention's effect】
In the invention of claim 1, a drill bit provided with a drill bit that protrudes from the tip and is driven to rotate, an auxiliary handle provided at the tip, and a telescopic dust collecting cup surrounding the drill bit, Since the dust collecting cup is detachably attached to the auxiliary handle, both the auxiliary handle and the dust collecting cup can be used simultaneously, and there is an advantage that the dust collecting cup does not rotate unexpectedly.
[0018]
In addition , the mounting base is detachably attached to the auxiliary handle, and the dust collecting cup is detachably attached to the mounting base, so that the mounting base can be easily attached to the auxiliary handle, and the mounting base can be easily attached to the dust collecting cup. There is an advantage that the dust collecting cup can be easily attached to the auxiliary handle.
[0019]
In the invention of claim 2 , the auxiliary handle holds the depth gauge substantially parallel to the drill bit, and the radius of the dust collecting cup is made smaller than the distance from the center of rotation of the drill bit to the depth gauge. In addition to the effect of Item 1, a dust collection cup and a depth gauge can be used at the same time, and even when it becomes difficult to see the drill bit by using the dust collection cup, drilling with a depth determined by the depth gauge There is an advantage that can be done.
[0020]
In the invention of claim 3, since the substantially V-shaped grooves in the dust-proof plate from the center of the dust-proof plate is formed radially, in addition to the effect of claim 1, a drill bit or the like as compared to conventional such slits There is an advantage that it is possible to improve the dustproofness of the chuck portion.
[Brief description of the drawings]
1A and 1B show an embodiment of the present invention, in which FIG. 1A is an overall perspective view, and FIG.
FIG. 2 is a schematic front view.
3A is a side view, FIG. 3B is a front view, and FIG. 3C is a rear view.
4A is a plan view, FIG. 4B is a sectional view, and FIG. 4C is a cutaway plan view showing a hook portion.
FIG. 5 is a schematic front sectional view showing a mounting state of the auxiliary handle.
FIG. 6 is a side view in which a depth gauge is attached to the auxiliary handle.
7A and 7B show a dustproof plate, in which FIG. 7A is a front view, and FIG. 7B is a cross-sectional view taken along line BB in FIG.
8A and 8B show a conventional dustproof plate, in which FIG. 8A is a schematic front view, and FIG. 8B is a sectional view taken along the line CC of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drill bit 2 Auxiliary handle 3 Dust collection cup 4 Mounting base 5 Depth gauge 6 Dustproof plate 7 Hole 8 Approx V-shaped groove

Claims (3)

A drill bit which is driven to rotate protrudes from the distal end, and an auxiliary handle provided to the tip portion, a drilling tool with a telescopic dust collecting cup surrounding the drill bit, detachable mount the auxiliary handle The dust collecting cup is detachably mounted on the mounting base, and the dustproof plate is attached to the mounting base by engaging the peripheral part of the dustproof plate penetrating the hole through which the drill bit is inserted into the mounting base. A drilling tool characterized by that. The perforation according to claim 1, wherein a depth gauge is held on the auxiliary handle substantially parallel to the drill bit, and the radius of the dust collecting cup is made smaller than the distance from the center of rotation of the drill bit to the depth gauge. tool. The drilling tool according to claim 1, wherein the dustproof plate is formed with a substantially V-shaped groove radially from the center of the dustproof plate.

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